Request to Exit Sensors Sacramento – Part 1
There are three main types of Request to Exit sensors. These types are Electronic Presence Detectors, Mechanical Switches (embedded in the locks), and Mechanical Switches with close proximity push buttons. The locks that contain a Mechanical Switch are largely considered the best type of Request to Exit sensors. The majority of Electrified Mortise Locks and Electrified Panic Locks can be equipped with a Mechanical Switch as an accessory. Basically, before door becomes fully unlocked as the handle is turned, a switch is triggers the Access Control Panel’s Request to Exit sensor and the alarm is bypassed.
Motion Detectors are another type of Request to Exit sensor that are commonly used. Motion Detectors are usually installed above the door they are securing, They usually contain small infrared detectors centered between the frame. These Motion Sensing Detectors, often called REX (short for Request To Exit sensors) have weak points. The sensors can be triggered when more than one person are standing in the Motion Detectors’ field of view, potentially allowing unauthorized users access. Also, in the case of double glass doors, objects can be slid in between the double glass doors to trigger the Motion Detector on the other side, and allow unauthorized access.
For more information about Request to Exit Sensors and all things Access Control check out Thomas L. Norman’s book Electronic Access Control.